neilconway commented on PR #20693:
URL: https://github.com/apache/datafusion/pull/20693#issuecomment-3997875840
Benchmarks:
```
group base target
----- ---- ------
array_distinct_sliced/10 1.72 588.8±8.31µs ? ?/sec 1.00
342.8±8.83µs ? ?/sec
array_distinct_sliced/100 1.92 5.6±0.09ms ? ?/sec 1.00
2.9±0.10ms ? ?/sec
array_distinct_sliced/50 1.93 2.8±0.06ms ? ?/sec 1.00
1469.1±44.20µs ? ?/sec
array_except_sliced/10 1.75 1110.5±10.75µs ? ?/sec 1.00
634.5±8.48µs ? ?/sec
array_except_sliced/100 4.06 23.2±0.29ms ? ?/sec 1.00
5.7±0.13ms ? ?/sec
array_except_sliced/50 1.95 5.6±0.09ms ? ?/sec 1.00
2.9±0.03ms ? ?/sec
array_intersect_sliced/10 1.80 1122.6±10.06µs ? ?/sec 1.00
623.3±18.21µs ? ?/sec
array_intersect_sliced/100 3.93 24.1±0.23ms ? ?/sec 1.00
6.1±0.12ms ? ?/sec
array_intersect_sliced/50 1.93 5.9±0.06ms ? ?/sec 1.00
3.1±0.05ms ? ?/sec
array_union_sliced/10 1.65 1175.6±11.55µs ? ?/sec 1.00
710.9±18.95µs ? ?/sec
array_union_sliced/100 3.65 24.9±0.29ms ? ?/sec 1.00
6.8±0.15ms ? ?/sec
array_union_sliced/50 3.60 12.2±0.38ms ? ?/sec 1.00
3.4±0.11ms ? ?/sec
```
These benchmarks use a ratio of 10:1 hidden:visible rows. The reason the
benchmark results don't show a ~10x speedup is that previously, we did row
conversion on the hidden rows but only applied the set operation to the visible
rows, so the latter part was not inefficient.
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